ISPLSI3256E-70LB320

Overview

The ISPLSI3256E-70LB320 is a high-density In-System Programmable Logic Device (ISPLD) from Lattice Semiconductor's ispLSI 3000 series. It features 3,256 system gates and operates with a maximum propagation delay of 7.0 ns. The device utilizes a 320-pin Low Profile Ball Grid Array (LPBGA) package. Key electrical characteristics include a supply voltage range of 4.5 V to 5.5 V for the core and I/Os. It supports JTAG-based in-system programming and boundary scan testing compliant with IEEE 1149.1 standards, allowing for flexible logic implementation and easy integration into complex digital systems.

Feature Summary

• High density with 3,256 system gates for complex logic applications
• Fast performance with 7.0 ns maximum propagation delay
• Supports In-System Programming (ISP) via JTAG interface
• Compliant with IEEE 1149.1 Boundary Scan standard

Applications

• Complex glue logic replacement in industrial control systems
• Address decoding and bus bridging in embedded systems
• State machine implementation for automated manufacturing equipment
• Protocol conversion interfaces in telecommunications infrastructure

Procurement Notes

Verify the specific suffix 'LB320' corresponds to the 320-pin LPBGA package and commercial temperature grade. Confirm the '-70' speed grade matches the required 7.0 ns timing constraints for your design. Ensure the source provides documentation confirming IEEE 1149.1 boundary scan support for testability planning.

Selection Notes

Select this component when designs require high gate counts exceeding standard CPLDs but need the simplicity of PLD architecture. The 320-pin package is suitable for high I/O count applications where board space allows for BGA footprints. Compare against the ispLSI 5000 series if higher density or lower power consumption is required for future scalability.

Part Context

This part belongs to the ispLSI 3000 family, which bridges the gap between low-density GALs and high-density FPGAs. It offers non-volatile configuration without the complexity of FPGA bitstream management. The family is known for deterministic timing and ease of use in traditional digital logic design environments.

Replacement Considerations

Direct replacements may include other parts within the ispLSI 3000 family with compatible pinouts or higher density variants like the ISPLSI3320. Cross-family migration to ispMACH 4000 or MACH XO series requires schematic redesign due to architectural differences and pinout incompatibilities.